Watt, Kenneth E.F., 1929-
Understanding the environment / Kenneth E.F. Watt.Understanding the Environment
Allyn and Bacon, 1982
 Buku Teks SO
Allen, James
Natural language understanding
Benjamin Cummings, 1987
 Buku Teks SO
Ellis, Peter, 1969-
Understanding research for nursing students
Learning Matters, 2019
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Kempson, Ruth M.
Dynamic syntax: the flow of language understanding
Blackwell , 2001
 Buku Teks SO
Greenbaum, Sidney
A students grammar of the English language
Longman , 1990
 Buku Teks SO